Machine for making window-envelops.



M. VIERENGEL.

MACHINE FOR MAKING wmoow ENVELOPS.

Patented Oct. 17, 1916.

APPLlCATlON FILED DEC. 12, 1911. 1,201,777.

l1 SHEETS-SHEET I- (gum-unifies v a M. VIERENGEL.

MACHINE FOR MAKING WINDOW ENVELOPS.

APPLICATION FILED DEC. 12, I911- 1,201,777.

H SHEETSSHEET '2.

maljlgatuemwa; Gjvwamtoz WWW U Patented Oct. 17, 1916.

M. VIERENGEL.

MACHINE FOR MAKING WINDOW ENVELOPS.

APPLICATION FILED DEC.12. 1911.

l ,201 ,777. Patented Oct. 17, 1916.

ll SHEETS-SHEET 3.

1 v {Human 1 60i U. 61/11111- 1 WWW-WW I I 9513 6111011121 I v M. VIERENGEL.

MACHINE FOR MAKING WINDOW ENVELOPS.

APPLICATION FILED DEC.I2.1911.

Patented Oct. 17, 1916.

11 SHEETS-SHEET 4.

5] mac wtoz M. VIERENGEL.

MACHINE FOR MAKING' wmoow ENVELOPS.

APPLICATION FILED DEC.12, 19H.

Patented Oct. 17,1916

H SHEETSSHEET 5.

-M. Y 1EREN,GE L. MACHINE FOR MAKING WINDGW ENVELOPS. APPLICATION FILED DECAL-19H.

1 ,201 ,777. Patented Oct. 17, 1916.

11 SHEETS-SHEET 7.

Illlll M. VIERENGEL.

MACHINE FOR MAKING WINDOW ENVEL'OPS.

APPLICATLON FILED DEC.12. 1911.

1,201,777. Patented Oct. 17,1916.

H SHEETS-SHEET 8.

Ja /z Z50 Q 46 w /Z 57 390 32g 5 wow 507,

M. VIERENGEL.

MACHINE FOR MAKING wmoow ENVELOPS.

I I APPLICATION FILED DEC- 12, 19H. 121,777. Patented Oct. 17,1916,

r, g: 2: [.345 366 i o v Q- 3% M. VIERENGEL.

MACHINE FOR MAKING wmoow ENVELOPS.

APPLICATION FILED DEC.12. 1911. 1 201 7'77. Patented OC'[.17,1916. 9 9 11 SHEETS-SHEET 1|.

rrED STATES PATENT OFFICE.

MATTHEW VIERENGEL, OF BROOKLYN, NEW YORK, ASS IG NOR TO SAMUEL CUPPLES ENVELOPE COMPANY, OF ST. LOUIS, MISSOURIA CORPORATION OF MISSOURI.

MACHINE FOR MAKING'WINDOW-ENVELOPS.

Specification of Letters Patent.

Application filed December 12, 1911. Serial No. 665.351.

.T 0 all ll'ilOmit may concern:

Beiit known that I. MATTHEW YIEREXGEL, a citizen of the United States. and resident of the borough of Brooklyn. in the county of Kings and State of New York. have invented certain new and useful Improve-' ments in Machines for Making Vindow-Envelops. of which the following is a full and said patched web and means for formingthe blanks into envelops. I

At one stage in the operation of manufaet-uring envelops. a supply of gum or paste is appliedto the parts of the web whlch constitute the sealing flaps of the completed envelops. This gum or paste for the sealing flaps is preferably applied to the moving web at the same time that the paste is applied around the window openings for sealing the patches thereto. The moving web with attached window patches and gum or paste for the sealing flaps, is preferably run through a drying stack to properly dry the patches upon the web and the gum or paste of the sealing flaps.

The invention also includes a printing -mechanisnr for printing the "envelop blanks prior to their formation into envelops; In

the preferred embodiment of the machine,

the printing mechanism and blank cutting mechanism are mounted upon a common -reciprocatory bed to effect the simultaneous printing of one .blank and the cutting or blanking outof the preceding blank. The window openings are cut from the web and the patches and'sealing flap paste are applied to the web whilethe web is moving at uniform speed: but the printing and blanking out operation are performed while the web is stationary. so that the feed of the web pastthe mechanisms for accomplishing these first. named results is continuous, while the feed of the web past the printing and blanking out mechanisms is intermittent. Between the continuous and 1nterm1ttent web feeding devices, I provide a web ,take-up device which takes up the surplusof web fromthe continuous feeding devices while the intermittentfeeding devices are at rest. and pays ofi' a suflicient extent of the web to the intermittent feeding devices when they act to place a new section of the web in position for the operation'of the printing and blankingout mechanisms.

The l'ilanking out mechanism cuts the successive sections of the patched and printed web with proper relation to the patched windows. giving the proper shape to the blanks which are to be formed into envelops. and impresses flap creasing lines upon the blanks. The blanks are not severed from the web by the blanking out mechanism but are carried b the movement of the web into position against the gages of the final envelop forming mechanism and severed from the web in said gaged position by a suitable intermittently operating knife. The successive creased blanks are taken by grippers upon a rotary envelop forming cylinder and carried through suitable folding guides which fold the side flaps of the blank inwardly in position to pass under pasting rolls which apply the paste or .gum to the infolded side flaps. A second set of side grippers upon the cylinder then engages the Patented Oct. 17,1916.

folded edges of the blank. while the first set of grippers releases the leading edge of the blank in time to be engaged by suitable fingers which pass the leading flap of the envelop over into engagement with the pasted side flaps. The pasted seams are then pressed down by passing suitable seam pressure rollers. The formed envelop is then delivered from the cylinder through suitable delivery grippers which carry the envelop through suitable guides and deposit it in the bight of suitable rollers which. cooperating with suitable controlling fingers. bend over the seam flap which pressed into place as the envelop is delivered from the machine.

In order that my invention may be fully understood I will first describe the same with reference to the accompanying drawings and afterward point out the novelty more particularly in the annexed claims.

In said drawings Figure 1 is a side elevation of my improved window envelop machine. Fig. 2 is a plan view of the same.- Fig. 3 is an end elevation of the same looking at the left hand end of the machine as illustrated in Fig. 1. Fig. 4 is an end elevation of the machine looking at the right hand end of the machine as shown in Fig. '1. Fig. 5 is a horizontal, sectional, plan view of the central portion of the machine showing the main driving gear arrangement. Fig. 6 is an enlarged detail elevation illustrating the mechanism for cutting window openings in the web. -.-Fig. 7 is a vertical sectional view of the same. Fig. 8 is an enlarged vertical sectional view of the paste and patch-applying devices. Fig. 9 is a.

plan view of the same. Fig. 10 is an enlarged detail side elevation of the central part of the machine looking from the side opposite to that shown in Fig. 1, represent- .ing particularly the printing and blanking out mechanisms. Fig. 11 is a plan view of the same. Fig. 12 is a detail view similar to Fig. 10 showing the blanking out mechanism, the intermittent web feeding mechanism, and the blank severing mechanism. Fig. 13 is a detail front elevation of parts of the mechanism shown in Fig. 12. Fig. 14 is a plan view of the main parts of'the mechanism shown in Figs. 12 and 13. Figs. 15 and 16 are detail views of the clutch for the intermittent web feed." Fig. 17 is an enlarged detail vertical, transverse sectional view of the machine taken on the line -4: of Figs. 1 and 2 showing the final envelop forming mechanism. Fig. 18 is a side elevation of thesame. Fig. 19 is a plan view of the same. Fig. 2O is a view similar to Fig. 17, showing parts in different position. Fig. 21 is a view similar to Figs. 17 and 20 showing more in detail the envelop delivery mechanism. Fig. 22-is an end elevation of the .parts shown in Fig. 21. Figs. 23 to 33 illustrate diagrammatically the successive stages of the web and blank in the formation of envelops by my improved machine.

In describing the -construction and operation of my improved machine for continuously manufacturing window envelops, I have taken up the mechanisms in the order in which they act upon the moving web fed from the roll of paper. Any suitable form of framework to properly support the operative parts of the machine may be employed. In the specific embodiment of the machine illustrated in the accompanying drawings, I.

have shown a main rectangular upright frame 1 mounted upon legs 2, and two auxiliarv frames arranged at opposite ends of and connected with the main frame 1 as hereinafter explained.

is a continuous roll of paper mounted upon an axle 6 supported in open socketed bracket bearings 7, securedto two of the The continuous web leading roll 11 is a pressure roller 13, whose trunnions are journaled in the elongated bearing slots 14 formed in extensions of the bracket arms 12. Any suitable means (not specifically shown)- may be employed for holding the pressure roll 13 in peripheral engagement with the roll 11 so as to effectively bite and feed the web of paper between them.

The shaft of the feed roller 11 projects beyond the bearing bracket 12 at one side of the machine and has secured to it a sprocket wheel around which operates a sprocket chain 16 driven by a sprocket wheel 17 keyed to the projecting end of a'transverse shaft 18 suitably journaled in the main side bars of the frame 1. This transverse shaft 18 carries a central gear 19 meshing with a similar gear carried by the main power shaft 21 which extends transversely of the main frame and is journaled in the main bars of said frame. This power shaft 21 carries at oneside of the machine a driving pulley 22.

The brackets 25 secured to the rear legs 2 of the main frame, support a transverse rod or'bar 26 upon which are mounted up wardly extending guide arms 27 supporting between them a series of parallel tension bars 28. The web 10 passing from the positively driven feed roll 11 is threaded through the tension bars 28; an excess of slack web being provided between feed roll 11 and the tension bars 28 in the form of loose loops as shown at 10 for the purpose hereinafter explained.

Secured to the rear end legs 2, just beneath main frame 1, are slotted bearing brackets 30 in which are ournaled the roller shafts 31, 32 and The roller shafts 32 and 33 are journaled in vertically adjustable bearing'boxes 34 and 35 which are held in desired adjusted position by means of set screws 36 threaded through the cross' bars 38 and engaging the lower bearing boxes 34. This is for the purpose of holding the rollers (presently to be referred to) upon shafts 31, 32 and 33 in proper working relation.

The shaft 33 carries feed roller 40 having a central peripheral recess 41 corresponding in extent with a. feeding and cutting roller 42 carried by shaft 32. Upon each side of the roller 42 are mounted the feed rollers 43 and 44 which are of the same diameter as the roller 42. The roller 42 carries upon one half of its periphery the male member or knife 45 of the dies which cut the Window openings in the web. This knife 45 may be cutting rollers 40. 13. 4-1. 42 'and 4:6 are of any desired shape, depending upon the shape required for thewindow opening. As shown in the drawings the knife 1L5 isshaped to cut an opening of flattened oval shape. The shaft 31 carries a roller l6 corresponding in size and position to the roller 42. This roller '16 is formed with a female die member 47 arranged to coopeuate with the knife member -15 in cutting window openings in the web. A pin 48 projects radially from the periphery of roller 16 within the die member 47, and the shallow radial opening et9 is formed the periphery of roller *2 in position to "receive the, pin 48 as the rollers 42 and 16 rotate. The purpose of the pin 48 is to penetrate and engage the strips of paper cut from the web by dies 15,

47 and carry them to a position above the roller 16 where they are led out of the machine. A stripping plate 50 is supported in peripheral engagement with the roller 16 and is formed with a central slot 51 to straddle the pin *8 each time the roller 16' revolves. The end of the. plate 50 passes beneath the projecting end of the cut out strip of paper carried forward by the engagement I of pin 48 and strips the same from roller 16 and leads it away from the rollers to any suitable receptacle which may be provided for the same.

The shafts 31, 32 and 33 are geared together by means of gears 52. 53 and 54 so as to cause the cooperating rollers upon said.

shafts to rotate in unison. The shaft 31 carries at one end a lar e gear 55 which meshes with and is driven by a gear 56 carried at one end of the transverse shaft 57 suitably journaled in the main frame 1. I 56 is driven by intermeshing gears 58- and 59 carried by transverse shafts 60 and 61 journaled in the main frame 1, the shaft 61 also carrying a central gear 62 meshing with and driven by a gear 63 carried by the transverse crank shaft 6-1 journaled in the main frame 1. and in turn driven by the gear 19 0 shaft 18 above referred to. r

By the means described. the feeding and driven. The continuous web 10 passes from the tension bars 28 over the feed roll -10,

around feed rolls 13. l-l and between the cutting and feeding rolls 42 and 46 which cut from the web a succession of spaced stituting one of the auxiliary frames of the machine above referred to.- This upright frameTO is rigidly secured to one end of the main frame at top and bottom by means of connecting bars 71. T2. The continuous web 10 passes from the window cuttmgmechanism just described. to an idler roller 75 freely journaled in the bracket hearings in the lower part of frameTO. and from the roller 75 the web passes across the frame The gear by which it is attached to bar 84, is cut out I to receive the fountain roller 83 and may serve as a scraper for said roll.

85 is a paste applying roll journaled in the adjustable bracket arms 86 and operating in peripheral engagement with the fountain roll 83. The arms 86 are pivoted upon the opposite projecting ends of shaft of fountain roll 83. and held in desired position by adjusting screws 86. This roll 85 has a recess 87 cut into its periphery of the proper size and shape to correspond with the size and shape of the window openings 10 cut into the traveling web 10. This recess 87 is surrounded by a paste applying surface 88 designed to apply a band of paste 10 around each window Opening 10 of the traveling web. the surface, of the roller 85 being cut away around .the surface 88 so as to avoid contact with the fountain roller 83 and avoid applying paste over the main surface of the traveling web. The paste applying roller 85 is also formed with a raised portion 89 at one end. in the same peripheral plane as surface .88, designed to take the paste from the roll 83 and apply it to the edge of the" traveling paper web 10. This pasteapplypaper. or it may be shaped to correspond with the finished sealing flap of the envelop, in which case the paste applied to the traveling web will not be continuous but will be intermittent. The strip of paste at the edge of the web which is subsequently cut into the sealing flaps 10 of the envelops, is indicated at 10 (Figs. 9, 25, 26 and 27).. As the web 10 passes around the roller 80.it is engaged by the paste applying roll 85 for applying the patch securing paste around the window openings and the pastefor the sealing flap of the envelops. The paste rollers 83 and 85 aremounted upon shafts having their projecting ends geared together 90 is a spool containing a continuous roll of transparent patch material of the kind that is commonly employed for covering the window openings of envelops of the type at present under consideration. This spoolv90 is mounted upon an axle 91 journaled in the bracket arms 92 extending rearwardly from the drier frame 70. The continuous web 93 of patch material is passed from the spool 90 into the bight of a pair of feeding and cutting rollers, 95, 96 which are mounted upon shafts 97, 98 journaled in bracket arms 99, and geared together by gears 100 and 101. The roller 95 carries a serrated knife blade 102 set longitudinally of the shaft 97, and the roller 96 is formed with a longitudinal groove 103 to receive the blade 102 in the rotation of rollers 95, 96 to sever from the web 93 a length or section of patchmaterial suitablefor applying over a window opening in the web 10. The cutting and feeding roller 95 is formed with a peripheral groove 104 into which project the guide fingers 105 carried by the transverse rod 105* mounted in bracket plates 99. The knife blade 102 is transversely slotted to enable it to pass freely by the fingers 105. These fingers 105 deflect'the leading edge of the web 93 from the roller 95 into the two inwardly presented grooved guides 106 extending downwardly toward the roller 80 above referred to. Stripper fingers 107 are also provided for preventing the web 93 from following the roller 96.

110 is a pressure roller mounted upon a shaft 111 journaled in the brackets 99. This pressure roller 110 is shorter in length than the roller 80 with which it coiiperates, it being designed to take the section of patched material fed upon the moving web 10 and press it firmly upon the pasted surface surrounding the window opening. The roller 110 is made short so as to avoid coming 1n contact with the pasted surface 10 of the moving Web. The feeding and cutting rollers 95 and 96 are arranged a proper distance away from the rollers 80 and 110 to supply the desired length of patch material into the bight of the rollers 80 and 110 at the moment a section of the material is partially cut off from the web 93, the web 10 passing between rollers 80 and 110 being operated at a slightly greater speed than rollers 95 and 96 to complete the separation of the patch from the web of patch material, and space the successive patches upon the web to accord with the spacing of the window openings. Rollers and 110 are driven by the web 10.

The sh ft .98 carries at one end a sprocket wheel 5 and a long sprocket chain 116 from a drivingsprocket wheel 117 carried by e shaftl3l above referred to. By this means the pasting rolls 83 and and the *passtjs/iround the sprocket wheels 115 and 83 feeding and cutting rolls 95 and 96 are driven at proper speed to correspond with the continuously moving paper web 10. The

-. rollers 95 and 96 continuously feed the web of patch material so that a section of patch material will be in readiness to be applied to a pasted surface around a window opening as each window opening arrives in position upon the roller 80.

The web 10 with patches over the window openings and paste applied to one edge for the subsequently formed sealing flaps, passes across the drying frame 70 to a pair of positively driven feed rollers 120 and 121 which are geared together at 122 and driven by a ear 123 meshing with the gear 54 upon roller shaft 33 above referred to.

The drier frame carries in suitable bearing brackets a plurality of freely journaled rollers 125 around which the web 10 with patches and sealing paste is passed back and forth, from side to side, of the drying frame. It will be observed by reference to Fig. 4 of the drawings that the roller 121 and the drying rollers 125 upon the inner side of the frame 7 0 are made shorter than the rollers at the outer side of frame 7 0 for the reason that the pasted surface at one edge of the web 10 is presented inwardly when the web passes over the rollers at the inner side of the frame. The patch and the paste for sealing flaps are dried as the web passes arciund the rollers 125 to the top of the drying frame 70.

At the inner end of the frame 70 at the top I provide a pair of feeding rollers 130 and 131 which are journaled in suitable brackets attached to the frame 70. The roller 130 is mounted in movable bearings to hold it in operative relation with the roller 131. The shaft of roller 131 is provided with a sprocket wheel 132 around which operates a sprocket chain 133 extending from a driving sprocket 134 keyed to a transverse shaft 135 journaled in suitable brackets secured to the main frame 1. This shaft 135 is mounted directly above and parallel with shaft 57 above referred to, a gear wheel 136 being secured to the end'of shaft 135 and meshing with a smaller gear,

137 secured to the adjacent end of the shaft 131 are'positively driven at the same speed as the web feeding rollers hereinbefore referred to.

The web 10 passes between the feed roll ers 130 and 131 and down under a slack take up bar 140 which is mounted to slide vertically upon the guide rods 141 secured in bracket arms 142. From the bar 140 the web 10 passes up over an idler roller 145 and thence extends through the main frame 1 past the printing and blanking out mechanisms to a pair of intermittently driven feed rolls 150 and 151 which are operated in the manner hereinafter explained. Since the feed of the paper web from the roll 5 up to the positively driven feed rollers 130 and 131 is continuous and the feed of the web from this point past the printing and blankmechanism.

4 bar 14:0 in its guides, and when the intermittent feed rollers 150 and 151 feed the web forward. said slack take-up bar will move vertically to permit the forward motion of a sufficient length of web 10 under the action of feed rollers and 151.

is the impression bed of the printing main frame 1 above the path of the web'lO. Beneath the bed 160 is mounted a printing forinwhich may be of any suitable construction since the printing mechanism specifically forms no part of the present invention. This printing form is indicated at 16.") supported in any suitable manner upon the vertically reciprocating frame 166 presently to be explained. The form isadapted to be inked by two or more inklng rollers 167 mounted in arms 168 carried by a pair of endless sprocket chains 169 running over sprocket wheels 170 upon shafts 171 and 172. The shafts 171 and 172 are journaled in the reciprocating bed or frame 166 above referred to. The shaft 172 projects beyond the frame 166 and carries upon its outer end asprocket wheel 175 on which operates an endless sprocket chain 176 extending around tension sprocket wheels 177 and 178 journaled upon an adjustable arm 179 and from said wheels 177 and 178 to a driving sprocket wheel 180 keyed to shaft 57 above referred to. The arm 179 has a tension rod 181 projecting from it through a bracket 182 of the main frame 1 and an adjustable tension spring 183 confined upon said rod 181. This tension device holds the tension sprocket wheels 17? and 178 yieldingly in operative relation to the sprocket wheels 175 and 180 so as to permit the reciprocation of the frame or bed 166. The inking rollers 167 are carried by their chains 169 over an ink distributing roll 185 working in an ink fountain 186 and an ink dis-- tributing plate 187 supported upon the frame 166 adjacent to the roller 185. In

this manner the ink rolls take the ink and apply it to the form 165- in the usual manner. Thevertically reciprocating frame 166 carrying the printing form 165 is provided at each side midway between its endswith the downwardly presented guide pins 190 which are pivotally connected to the frame at 191 and extend'through guide lugs 192 presented inwardly from the.bracket arms 12 above referred to. The springs 193 surround the pins 190 and are confined thereon between the guides 192 and collars-194 upon the pins.

This bed 160 is mounted in the These springs 193 tend to raise the frame 166 in the main frame 1, and serve to counterbalance the weight of the frame.

Beneath the verti ally reciprocating bed frame 166 is mounted the crank shaft 61 above referred to, and a similar crank shaft 195 carryinga gear 196 which meshes with and is driven by the gear 20 of the main shaft 21. These two crank shafts 64 and 195 are provided at their opposite ends with crank armsl97 which are connected through the links 198 with four points of the vertically reciprocating frame 166, so that the uniform rotation of the crank shafts will cause the frame 166 to be moved "ertically in its guides upon the main frame 1. Each upward movement of the printing form 165 carried by the frame 166 makes an impression upon the section of the web 10 stretched over the impression bed 160. 200 is the grooved member or bed of the blanking out die. which is mounted upon the main frame 1.

201' is the movable knife member of the blanking out die mounted upon the vertically reciprocating frame 166. These die members 200 and 201- are arranged in the usual manner to cut from the web of paper an envelop blank of the desired design. Each blank in addition to being outlined by the dies has the folding lines between the flaps and the main body of the blank creased or outlined by creasing dies carried by the die members 200 and 201. The blanks are cut'from the web with the exception of the end flaps which are left intact for feeding purposes and subsequently severed for separating the blanks.

Between the impression bed 160 and blanking out die member 200, I provide an idler roll 205 journaled in the free ends of supporting arms 206 which are adjustably mounted upon frame 1 at 207. This idler roller 205 has the continuous web 10 passed over. it at a point between the printing and blanking out mechanisms, and tends to hold the web tightly across the faces of the upper members 160 and 200 of said mechanisms. To prevent there being any slight discrepancy in the relation of the patched. windows to the printing or blanking out mechanisms, 7

complished by providing intermittent op- 150 and 151 above referred to. These rolls 150 and 151 are mounted upon shafts 210 crating mechanisms for the web feeding rolls 7 and 211 suitably 'journaled in the main frame 1. The shaft 210 carries a gear wheel 212 which meshes with and is driven by a gear 213 mounted upon a shaft 214 journaled in the frame 1 above the shaft 210. This shaft 214 is provided at one end with a ratchet clutch and a rack and pinion driving mechanism. 215 is the clutch collar pinned to the end of the shaft and formed with ratchet recesses 215 as shown particularly in Figs. 15 and 16 of the drawings.

216 is a loose clutch memberfreely journaled upon the shaft 214 adjacent to the fixed collar 215 and carrying in suitable longitudinal recesses 217 the spring dogs 218 which are designed to engage in the ratchet recesses 215 when the clutch member 216 moves in one direction and to slide out of such engagement when the member 216 moves in the opposite direction. The clutch member 216 has secured to or formedintegral with it a gear 219 which meshes with and is drivenby a reciprocating rack bar 220 working in a suitable guide 221, said rack bar being connected at its lower end 222 with a bell crank lever 223 journaled to the machine frame at 224 and connected by link 225 with one of the crank arms 197. By these means the web 10 is given an intermittent forward motion past the printing and blanking out mechanisms, the printing and blanking out being accomplished while the web is at rest.

Adjacent to the intermittently operating feed rollers 150 and 151 I provide a shear mechanism for cutting the successive blanks from the web. This mechanism comprises the stationary knife bar 230 supported by bracket 231 beneath the plane of feed of the blanked out web, and a movable'shear blade 232'adjustably carried by the rock shaft 233 journaled in thebracket 231 and having a rock arm 234 connected with a link 235 V which is pivoted at its lower end 236 to a rocking lever 237 journaled at 224 and carrying at its opposite end an anti-friction roller 238 which operates in the grooved cam 239 keyed to the shaft 195 above referred to. The operation of the shear mechanism with respect to the intermittent feed mechanism is such that immediately following the feeding impulse of the feeding mechanism, the shears are actuate to cut off a blank from the web. Each blank is out off while it is supported upon the feeding in table of the final envelop forming mechanism which will now be described.

I will have it u erstood that the essential novelty of my im rovedma'chine lies in the combination of mechanisms hereinbefore described for continuously manufacturing window envelop blanks from a continuous web of paper. The envelop forming mechanism which I am about to describe should be understood as the preferred form of mechanism for accomplishing the final step in the velops by various forms of envelop machines,

whether acting upon separated blanks as in the illustration in the accompanying drawings or upon a continuous web of blanks, without first separating the blanks by the shearing mechanism above described, as is done in some forms of envelop machines.

Referring to the envelop forming mechanism shown in the drawings, it will be observed first with reference to Figs. 1, 3. 5, 18 and 20 that a shaft 250 extends longitudinally of the main frame 1 and is journaled in suitable bearings in said frame and pro jected to the left of Fig. 1 where it has bearings in an auxiliary frame 245 constituting the support for the envelop forming machine proper. This driving shaft 250 of the forming machine is driven by miter gearing 251, with the transverse shaft 135 above referred to. At the outer end of the shaft 250 I provide a gear 255 meshing with a similar gear 256 upon a cam shaft 257 journaled in the auxiliary frame 245 and carrying suitable cams hereinafter referred to, for operating certain parts of the envelop forming mechanism. This gear 256 meshes with and drives a large gear 258 secured to the shaft 259 suitably journaled in the auxiliary frame 245 and carrying the gripper cylinder of the forming mechanism as presently explained. This large gear 258 meshes with and drives a smaller gear 260 keyed to the end of an auxiliary cam shaft 261 journaled in the frame 245 and carrying certain operative cams hereinafter described.

As stated above the intermittently'operated feed rollers 150 and 151 forward the paper web sufficiently beyond the shears 230232 to cause the leading edge of the web (which becomes one side of the completed envelop blank) to engage and register with a guide plate 265 mounted at one side of a blank receiving table or platform 266 supported upon the frame 245 and constituting the feed table of the final envelop forming mechanism. IVhen the envelop blank is severed from the web it rests upon the table 266 between the shears and the gage 265. Immediately after a complete envelop blank is deposited upon the table 266 it is engaged by a forked plate 267 which flattens out the blank upon the table. This forked plate 267 is ournaled upon a bar 268 secured in the frame 245 and has a projecting rock arm 269 from which depends a forked pitman 270 guided upon the shaft 261 and carrying an anti-friction roller 271 operating upon the periphery of a cam 272'carried by shaft 261.

Mounted upon the shaft 259 is a gripper cylinder 275 which carries two end grippers 276 mounted upon oscillating gripper shafts 277 journaled in the gripper cylinder 275 and provided with gears 278 meshing with oscillating segments 279 pivoted at 280 each carrying an anti-friction roller 281 operating upon a stationary controlling cam 282 suitably secured to frame 215. These two grippers 276 are constructed and operated the same as the grippers upon the cylinder set forth in my Patent No. 1,000,057 dated August 8th. 1911 for improvements in en velop-machine. Each gripper 276 is designed to engage the leading edge of a blank and grip it againstthe cylinder surface 275 In addition to the two grippers 276, the cylinder 275 carries two pairs of sidegrippers 285 actuated by stationary cams 286. The construction and operation of these side grippers 285 is substantially the same as set forth in my above named patent and need not be further described in the present case. Neither of the gripper structures referred to forms any part of the present invention when considered in a specific. sense. Projecting from the feed table 266 in line with the side gage 265 andthe lower-shear member 230 (which practically constitutes a gage member parallel with said gage-265) are'the usual curved side fold forming guides 290 which extend partly over the upper periph ery of the gripper cylinder 275. 291 is a pressure roller mounted in rock arms 292 journaled upon the frame 245 at 293. This pressure roller 291 operates in peripheral engagement with the gripper cylinder 275.

lVith an envelop blank, such as shown in the drawings in position upon the table 266 its leading edge or bottom flap 10 is engaged by one of the grippers 276, as the gripper rotates in the direction of the arrow and the blank is thereby pulled off of the.

table beneath the plate 267, causing the side flaps 10 to engage the guides 290 and be folded inwardly upon their creased lines over the side edges of the plate 267. The infolded side flaps are firmly pressed down upon the blank in their infolded position as shown in Fig. 30 by the engagement of the pressure roller 291. \Vith the blank in this position the infolded side flaps are brought into peripheral engagement with the pasting segments 295 which apply lines of paste to the infolded side flaps as shown in Fig. 31 of the drawings. These paste segments 295 are mounted upon a shaft 296 journaled in the frame 245.

adjustable bearings 297 of the adjustably mounted bracket arms 298 carried by a shaft 299 journaled in the bracket extensions of This shaft 299 carries a fountain roller 300 o crating in a paste fountain 301 supported upon a bar 302 which is adjustably mounted upon the bracketextensions of the frame 215. Secured to the projecting ends of the shafts and 299 are sprocket wheels 305 and 306 respectively, around which operates an endless sprocket chain 307. Shaft 296 is also provided with a gear 308 which meshes with and is driven by the large gear 258 which operates the gripper cylinder, see Fig. 3.

As the pasting segments 295 start to act upon the infolded side flaps of the blank one pair of side grippers 285 take hold of the blank just in rear of the bottom flap seam line and the end grippers 276 release their hold upon the leading edge of the bottom flap. At the moment of the release of the end gripper 276, a pair of stripper fingers 310 engage the leading edge of the blank and move it outwardly from the gripper cylinder. These stripper fingers 310 are of angular formation and are mounted upon a square bar 311 projecting laterally from a rock arm 312 which is freely journaled upon the shaft 250 and carries an anti-friction roller 313 operating in peripheral engagement with the cam 311 secured to the shaft 257. A spring 315 holds the rock arm 312 in operative relation to the cam 311. The 9 stripping fingers 310 successively take the positions shown in Figs. 17 and 20, as the blank with pasted infolded side flaps is carried forward under the control of the side grippers with the result that the end flap 10" of the blank will be folded over on the bottom foldline and caused 'to adhere to the folded inturned flaps. The folded over bottom flap is firmly pressed against the pasted side flaps by means of a pressure roller 320 upon shaft.257 which engages the side seams of the envelop as it is carried forward. The side grippers 285 continue hold of the folded blank until they reach a point substantially in a line drawn from the cylinder shaft 259 and arock shaft 325, at which point the grippers 285 transfer the sheet to a delivery gripper which will now be explained.

Mounted upon the rock shaft 325 is a yoke-shaped frame 330 formed with a forward gripping bar 331 with which coiiperates a gripping finger 332 mounted upon a rock shaft 333 journaled in the yoke-shaped frame 330. A spring 331 connects an arm 335 of rock shaft 333 with a stationary point 336 upon frame 330 to give the gripper 332 a normal closing tendency. The gripper shaft 333 has a second rock arm 337 adapted to run upon a stationary controlling track bar 338 secured tothe frame 245 and to operate upon and around a cam finger 339 pivotally mounted in frame 245 at 310 and yieldingly held in engagement with stationary track bar 338 by a spring 341. As will presently appear the arm 337 is adapted to travel upwardly from track bar 338 into engagement with. cam finger 339 which opens the gripper by straining its spring 334 and holds it open until the arm 337 slips off the upper end of cam finger 339 and permits spring 334 to close the gripper. At this moment of the closing of gripper 332 the folded blank carried by side grippers 285 upon cylinder 275 is presented between the gripper jaws so that the blank is transferred from the cylinder to the delivery gripper. As the delivery gripper 332 moves downwardly with the blank, the controlling arm 337 again operates on track bar 338 forcing 330. An arm 330 projects from shaft 325v and is connected byspring 330 with a stationary rod or bar 245. The cam 348, opposed by the spring 330", causes the gripper frame 330 to reciprocate vertically while the controlling devices open and close the gripper to take a sheet from the cylinder 275 and deliver it to a pair of circumferentially grooved pressure and feeding rollers 342 and 343 which are mounted respectively upon the shafts 342 and 343* driven by gears 350, 351 and 352, from the gear 256 upon the shaft 257 above referred to.

Freely mounted upon the shaft 343 is a swinging plate 355 which is connected by a loop 356 with a curved link 357 pivotally connected with one arm of a yoke-shaped rock arm 358 secured to the shaft 346 and having pivotally connected with its other arm a forked pitman 359 straddled and guided upon the shaft 250 and carrying an anti-friction roller 360 which operates upon the cam 361 upon shaft 250. Rock shaft 346 also carries an arm 362 to which a spring 363 is attached causing pitman 359 and connected parts to follow'the control of" cam 361. This swinging plate 355 rests normally in the position shown in Fig. 17 during which position the folded blank or envelop is transferred to the delivery gripper. The moment the delivery gripper starts downwardly to deliver the envelop to rollers 342 and 343 the plate 355 is swung into vertical position as shown in Fig. 21, to guide the envelop into the bight of said rollers with its sealing flap projecting forward.

Directly beneath the pair of rollers 342 and 343,is a final pair of delivery rollers 365 and 366 mounted upon shafts 367'and 368 driven by gears 369 and 370, the latter of which meshes with the gear 255 above referred to. Channeled guides extend between the rollers 342343 and 365-366 to form a guide channel for accurately passing the envelop from one pair of rollers to the other.

Resting above the rollers 365, 366 is a horizontally reciprocating plate 375' formed with a hooked end 376 and mounted upon a bar 377 pivotally mounted in the free ends of a yoke-shaped frame 378 which is keyed to and depends from a rock shaft 379 provided with a rock arm 380 from which projects a forked pitman 381 which straddles and guides upon the shaft 261 and carries an anti-friction roller 382 which operates upon cam 383 secured to said shaft 261.

, wardly.

Coiiperating with the sliding plate 375 is a hook shaped tucker plate. 385 mounted upon rock shaft 386, provided with a rock arm 389 connected with a forked pitman 390 which straddles and guides upon the shaft 250 and carries an anti-friction roller 391 operating in peripheral contact with cam 392 upon the shaft 250. As the sealing flap 10 of. the envelop is pulled to one side, the tucker plate 385 moves downwardly and engages the flap upon its creasing line and presses thesame into the bight of the final delivery rollers 365, 366, which firmly press the sealing flap against the completed envelop and drop the envelop into a packing box or other suitable receptacle provided to receive it. In the particular form of envelop finishing mechanism shown, the gripper cylinder is designed to take and form two envelops for each revolution, there being two end grippers and two pairs of side grippers.

The operation of the improved machine will be clear from the above description. The important characteristic of the machine is the continuous manufacture of window envelops from a web of paper, a result which has hitherto not been accomplished in the art. The machine described accomplishes this important result in a compartively simple and efiective manner. The detail construction of the several mechanisms combined for producing the result is not es The sizes of the several positively driven feed rollers can be changed to suitthe size and styles of envelops to be made so as to effect the proper cooperation of the several parts of the machine. The dies for cutting the window openings may be varied in size and shape and the blanking out dies can of course be changed to suit the required size and style of envelop to be produced.

A very important feature of the present invention is the simple mechanism for continuously applying transparent patches over the window openings; The means for con tinuously feeding the web of patch material and for cutting window lengths from the web in proper sequence to supply them to the spaced window openings, is considered of great importance because of its simplicity and effectiveness. The speed of the patch feeding devices can be accurately regulated with reference to the speed of the constantly moving web so that the patches will be 'ac-' curately spaced and applied to the web over the successive Window openings, which are cut into it. 4

The paste applied to one edge of the moving web which is afterward formed into sealing flaps for'the envelops is preferably applied in a succession of separated patches, particularly when the paper web is thin, since the separated "patches of paste'are not so apt to curl the edge of the web.

What I claim is:

l. In a machine of the character described,-

the combination of means for continuously moving the envelop material having window openings therein, means for applying patches 'to the continuously moving envelop material, and means for timing the operation of said patch applying means to effect longitudinal registration of the patches over the window openings and spacing apart of the successively applied patches.

2-. In a machine of the character described, the combination of continuously operating means for feeding a web of paper, continuously operating means for cutting a succession of spaced windowopenings in said moving web, means for pasting the surface of the moving web around said :window opefsn ings, and continuously operating means or applying patch material upon the pasted surfaces of said moving web over said window openings.

' 3. In a machine of the character described, the combination of means for feeding a web of paper, with "a window cutting device constructed to operate upon said web while it is moving to cut a succession of spaced window openings therein, means for pasting the surface of the, moving web around said win- ;dow openings, and means for applying spaced sections of patch material to the pasted surfaces of said web over said win dow openings. r i

4. In apparatus of the character described,

the combination with means for feeding the perforated envelop material; of rotary patch applying means for rolling patches into e'ngagement with themoving perforatedenvelop material, and means for coordinating the operation of said feeding and applying means to effect longitudinal registration of the patches over the perforations and spacing apart of the successive patches.

5. In a machine of the character described,

the combination with mechanism for feeding a continuous web of paper, means for, forming spaced window openings =in said continuous web of paper, and meansfor applying patches to the continuous web of paper; of means for coordinating the operations of said feeding means and patch applying means to effect a longitudinal registra' tion of the patches over the previously formed window openings andspacing apart of the successively applied patches.

' 6. In a machine of the character described, the combination of means for-feeding a continuous .web of paper, window cutting means operating upon said moving web, pasting means for applying paste to said moving web around said window openings, and,

patch applying means for supplying a succession of spaced patches to the pasted surfaces of said moving web. 7. In a machine of the character described,

' the combination of means for feeding a con- .tinuous web of paper, window cutting means operating upon said moving web, pasting means for applying paste to said moving web around said window openings, patch applying means for supplying a succession of separated patchesto the pasted surfaces of said moving web and means for'idrying the pas-ted patchesupon said web. I

8. In a machine of the character described, the combination with mechanism for feed? ing a continuous web of paper, means for forming spaced window openings in said continuous web of paper, and means for applying patches to the continuous web of paper; of means for coordinating the operations of said feeding means and patch applying means to effect a longitudinal registration of the patches over the previously formed window openings and spacing apartof the successively lapplied patches, and' means for forming window envelop blanks from the web thus prepared.-

9. In a machine of the character described, 

